Improvement in gauges for mortising window-sash



altred tang atelt@ five.

Muy@ W W'. P. BOYD,IOF THORN'IOWN, INDIANA.

Latas Param: No. 84,407, dated Novembw 24, 1868.

IMPROVEMENT IN G-AUG-ES FOR MORTISING- WINDOW-SIAS-H.

The Schedule referred to in these Letters Patent and making part of thesame;

.ence marked thereon.

The nature of my invention consists in the arrangement of a number ofmovable stops or bolts inabar,

to be placed on a common mortising-machine, for the` purpose of cuttingthe mortises in a sash.

In order to enable others skilled in the art to which my inventionappertains, to make and use the saine, I will now proceed to describeits construction and operation, referring to' the annexed drawings,which form a part of this specification, and in which- Figure l is aside view,

Figure 2, a plan-view, and

Figure 3 is a sectional side view of one of the bolts' or stops.

-A represents a bar, made of suitable material and dimensions, which iscut with a groove from its upper side, leaving asolid piece in thecentre, as well as at each end, as shown in iig. 2.

In this groove is inserted a series of blocks, B B, each of which isprovidegLwith a stop 'or bolt, C, passing through the same, andextending a suitable distance.

The blocks B B are grooved so as to permit the stops C O to be presseddown level with the upper side of the blocks and the bar A, and a spiralspring, a, is placed around each stop, C, in each of the blocks, holdingsaid bolt np-when not so pressed upon.

The blocks B B can be moved, and secured at any point desired in thegroove on the bar A, by means of screw-bolts b b, 'passing through slotsin the 4sides of the bar A, and through ahole in said blocks, the boltsbeing then fastened by screws d d, as shown in iig. 1.

The operation of my device is as follows:

The bar A, which should befrom eight to ten feet in length, is screwedfast or otherwise secured to 4the rest of any common mortising-machine,with its centre just under the chisel.

Tenon the sash first, and then set the stops as far apart as the size ofthe glass, placing the shoulder of the sash-stile against the stops. I

. If twelve-inch glass is wanted, the two inside stops are set justtwelve inches from the centre, each way; then the mortise, which isgenerally half an inch, is cut by merely revolving the chisel; then thenext stop is set twelve inches from the first one, making two feet` fromthe centre, under the chisel; then run the shoulder of the style againstthe stop, and bring the chisel down to ma'rk it; then, if the mortise iswanted one and a half inch long, set the outsideA stop, just one and ahalf inch from the other one, which will give the size of the mortise.

When using the outer stops, the intermediate ones are pressed down intothe blocks.

By thus bearing the. sash against the stops in suc cession, each andevery mortise in the sash may be cut without being laid off, thus savingboth time and labor.

vAfter the gauge has been set for any certain size sash, any person canwork the same without the possibility of a mistake.

Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is- A Thecombination of the adjustable blocks B B, stops or bars O C, and slottedor grooved bar A, all arranged as described, and operating substantiallyas and for the purposes herein set forth.

In testimony `that I claim the foregoing, I have hereunto set my hand,this 11th day of July, 1868. W. P. BOYD. Witnesses:

GEO. W.'F1ELDING JOHN BROWN.

